<template>
  <div>
    <el-container>
      <!-- 轮播图 -->
      <el-main>
        <!-- interval自动切换的时间间隔，单位为毫秒 -->
        <!--动态将图片轮播图的容器高度设置成与图片一致-->
        <el-carousel :interval="2000" type="card" height="300px">
          <el-carousel-item v-for="item in imagebox" :key="item.id">
            <img :src="item.idView" class="image" />
          </el-carousel-item>
        </el-carousel>
      </el-main>
    </el-container>
  </div>
</template>

<script>
export default {
  name: "lbt",
  data() {
    return {
      imagebox: [
        { id: 0, idView: require("../image/daocun.jpeg") },
        { id: 1, idView: require("../image/fish.jpg") },
        { id: 2, idView: require("../image/tongren.jpg") },
        { id: 3, idView: require("../image/zhenbai.jpeg") },
        { id: 4, idView: require("../image/sky.jpg") },
      ],

      // 浏览器宽度
      screenWidth: 0,
    };
  },
  methods: {
    setSize: function () {
      // 通过浏览器宽度(图片宽度)计算高度
      this.bannerHeight = (400 / 1920) * this.screenWidth;
    },
  },
  mounted() {
    // 首次加载时,需要调用一次
    this.screenWidth = window.innerWidth;
    this.setSize();
    // 窗口大小发生改变时,调用一次
    window.onresize = () => {
      this.screenWidth = window.innerWidth;
      this.setSize();
    };
  },
};
</script>

<style scoped>
/* 轮播图 */
.el-carousel__item h3 {
  color: #475669;
  font-size: 18px;
  opacity: 0.75;
  line-height: 300px;
  margin: 0;
}

.el-carousel__item h3 {
  color: #475669;
  font-size: 14px;
  opacity: 0.75;
  line-height: 200px;
  margin: 0;
}
/* 轮播图没有图片的时候默认的颜色 */
.el-carousel__item:nth-child(2n) {
  background-color: #99a9bf;
}
/* 轮播图没有图片的时候默认的颜色 */
.el-carousel__item:nth-child(2n + 1) {
  background-color: #d3dce6;
}
img {
  /*设置图片宽度和浏览器宽度一致*/
  width: 100%;
  height: inherit;
}
</style>